Concrete structure



T. H. KANE CONCRETE STRUCTURE March 3, 1931.

Filed July 29, 1925 INVENTOR ATTORNEY Patented. Mar. 3 1931 U NE I T S THOMAS H. KANE, OF YOUNGSTOWN, OHIO,

ASSIGNOR TO TRUSCON STEEL COMPANY,

OF YOUNGSTOWN, OHIO, A CORPORATION OF MICHIGAN concanrn srnucrunn Application filed July 29,

The present invention relates to improvements in concrete floor structures and more specifically to expanded metal lathing for ceiling the under side of such structures.

Among the objects of the invention is to overcome in an eiflcient and economical manher the serious objection, heretofore encountered, of having the commonly used sheet metal floor forms spread upon application of even light loads before the concrete has hardened and thus decrease the thickness of the joists.

Another object is the more eficient support of the expanded metal upon the lower 15 edges of the joist portions of arched concrete floors.

The invention consists broadly in providing the expanded metal and the floor forms with co-operating portions which prevent the spreading of the joist form portions, thus preserving the desired dimensions and at the same time providing a secure anchorage for the expanded metal in the lower edges of said joist portions.

Reference is made to the following description and drawing, in which:

Fig. 1 is a section through a finished floor with a part broken away showing the parts in position.

Fig. 2 is a similar section through such a floor at an intermediate step showing an alternate form of anchoring means.

Fig. 3 is an enlarged view of a part of Fi I Fig. 4 is a side view, with part in section, of the expanded metal shown in Figs. 1 and 3. i

Fig. 5 is an enlarged view of a part of Flg. 2cshowing one method of using this form of expanded metal.

Fig. 6 is a sideview of the form of expanded metal shown inFig's. .Q and 5.

As indicated in the drawings, the sheet metal floor forms 10 are of the usual channel or inverted U-shaped form, plain or ribbed for greater strength and stiffness, but are pro vided with flanged lower edges as at 11. These flanges provide both a flat footing for the forms upon the temporary supports and 50 also provide means to co-operate with the 1925. Serial No. 46,767.

improved expanded metal lathing to attain the objects above mentioned.

The preferred form of expanded metal lathin g is a modification of that described and claimed in the patentito Kahn, N 0-. 987,374, dated March 21,, 1911, Ribbed expanded metal. This material is expanded sheet metal having spaced, raised ribs of unexpanded metal extending crosswise a length of the material. In the drawings, the expanded portion is indicated at 15 and the ribs at 16.

The improvement consists in providing at the ends of the ribs, anchoring clips, such as are indicated at 20 and 21, furnishingabut m-ents against whichv the edges of flanges 11 rest so as to prevent outward'or spreading movement. These clips may be integral and struck up from the rib material, as at 20 in Fig. 4C, or they may beof shortjlengths of wire" or rod bent at a right angle and inserted through suitable slots,-as at 21 in Fig. 6. If the clip is of wire, the sides of the rib may be punched or pressed inwardly, as at 2:2, to hold the wire against dropping down before it is attached either by bending over flange 11, as in Fig. 5, or becoming anchored in the co-ncrete. The integral clip 20 is preferably of the shape indicated, that is, it forms on one side a notch 23 into which extends the flange 1 i 11, thus adding to the strength of the anchora e.

In forming a floor with the materials men-' tion ed, the temporary supports are first erected and this will include the boards or timbers 25, extending along the lower edge of the joist form, supported by the uprights 26.

The expandedmetal, with the clips on each rib, or alternate ribs, or even every third'rib, Y is then laid on the timbers 25 longitudinally with the clips extending upwardly. The forms 10 are then placed on the expanded metal with the flanges 11 inside and against the pairs of clips. Nex if wire clips are used, they may be bent over on the flanges, although this step is not essential. *After this, the concrete is poured and allowed to harden. Using the forms and expanded metal described does not permit the forms to spread upon application of the load of wet 1m concrete or the weight of the workmen, as is apt to happen otherwise.

a After the concrete has hardened, plaster is applied to the expanded metal and the latter with its plaster load is securely supported by the anchorage of the clips in concrete forming the lower edges of the joist portions.

Having now described the invention and the preferred form of embodiment thereof, it is to be understood that the invention is not to be limited to the specific details hereinbefore set forth-but only by the scope of th claims which follow.

Claims:

1. Means forming concrete floors having integral joist portions, said means consisting of sheet metal channel members of inverted U form and metal lathing, the said lathing ada )ted to lie substantially fiat with the said members resting thereon and said members and lathing being provided with interlocking portions serving to prevent spreading of the members and to furnish anchorage for the lathing, said interlocking portions being provided upon upward prov jections of ribbed portions of said lath.

2. Means forming concrete floors having integral joist portions, said means consisting of sheet metal channel members of inverted U form and metal lathing, the said members being provided with outwardly extending horizontal flanges and the said lathing with abutments with which said flanges are adapted to contact and interlock, said abutments being provided upon upward projections of ribbed portions of said lath.

THOMAS H. KANE. 

